Pioneer HPM-150 after full restoration and upgrade
Restoration bucket list:
– refoamed woofers
– super tweeters taken apart and cleaned
– new silver plated copper internal wiring
– new high end banana posts
– new crossovers with Jantzen Cross Coil Inductor and Clarity cap capacitors all with 2% tolerance, Resistor – MOX 1% tolerance
– deox potentiometers
– added internal sound dampening
– cabinets sanded,
– front and top sprayed with matt black
– high gloss finish of walnut veneer: 3 layers of high gloss acrylic with 2 more layers of high gloss yacht varnish on top of it.
– back side of speaker re-sprayed brown high gloss
– set of extra castor wheels
Finished cabinets
Ready for black matt paint
Spraying
After front and top sprayed with matt black
before and after
back side of speaker re-sprayed brown high gloss
Sanding before first layer of yacht varnish
First layer of yacht varnish
Removing super tweeter transformers from original crossovers
Drawing of new crossovers
Position plan of new crossovers with components
Assembled new crossovers
Pioneer HPM-150 back panel with banana speaker posts
Pioneer HPM-150 back panel with soldered speaker posts
Marten Electric @ Blog 
Will you sell this?
Maybe one day. How much do you offer?
I send you emails.
I am interested it buying regards
would you sell your pioneer HMP 150 speakers
Hello,
Excellent work, congratulations !!
Why you replace the original crossover ??..Whats the design you used as upgrade ???
Thanks in advance
Hello there,
I’ve replaced a crossover because it was low quality and bad design. I used a very same schematic with high grade components and better mechanical and spacial design to limit cross interference of coils. Please follow YouTube channel I will post a new video shortly where I explain some aspect of my decision.
Do you sell or would you think about selling crossovers the pair making them for people I mean
I don’t think there would be much of a interest because like I mentioned they cost me just on parts £150 or so…
where you buy this components?
where youbut crossover components?
I bought it from the Jantzen dealer
Just to comment I have a pair and I upgraded just the caps to all full paper oil caps… YES VERY LARGE VERY EXPENSIVE 200 for each speaker… Oh my the clarity with just them is unreal… HI END BOUTIQUE CAPS… I understand some of the glue and other layout can actually cause interference but my upgrade is nice… drive them with a M90 recap upgraded amp and love them… just can’t decide whats better them or the DSS9’s or actually 4 DDS5’s wired in parallel the base is unreal… they could use better crossovers but darn for duall 10″ drivers and side by side they kick and can handle the M90 full power no breakup….he he I have six pairs of these little gems DSS5 gems and 5.1 is just killer… with 5 M90’s only downside is the heat and power bill… but impressive…
Good Day! I have a pair of a HPM 150, i changed the electrolyt caps with a foil cap. I left the crossover original for now (the coils) I changed the terminals with WBT terminals, i changed the internal wire. Got one problem the super tweeters on the top of the speakers are almost not playing. I wanted to meassure them but they have no impedance . Could You help ? How are the s.tweeter build. Thanks
I am looking to buy a pair of Pioneer HMP 150 SPEAKERS my email address is pauldaily@talktalk.net 5/12/19